I think you're only examining one side of the story. Live in China for some time and see how they look at the rest of the world and people. And look at how we treat other current threats on the world stage at the moment. We do not make a special case for China --if anything the US has wishfully thought that if we treat them like a democracy they'll become a democracy and that has proven incorrect.
US foreign policy is not about spreading democracy. That's a bedtime story told to young Americans who don't know any better. The US is fine working with dictators; it's when those dictators stop playing ball or are ousted that we suddenly want to spread democracy. Noriega, Hussein and the Shah are easy examples.
Ok, to use American parlance, we expected them to play ball on an even field. Of course pols/biz were blinded by the big $$ in their eyes and could not see beyond that, but the expectation with was that the legacy of Deng and Hu would continue to soften the CCP and eventually become (economic) "partners" of some sort. Maybe not completely an open democracy but also definitely not the more authoritarian swerve it's taken over the last 10 years or so.
And the idea that america props up dictators or topples regimes because “it wants their oil” is a bedtime story for jaded American teenagers who don’t know any better. If that was true American foreign policy would look a lot different (and wouldn’t be such a money sink). Where’s all that Iraqi oil money again?
U.S. foreign policy is aimed at maintaining stability and facilitating liberal capitalist democracy. We don’t regard popular movements that are communist or theocratic as “democracy” so we’re willing to support dictators to forestall that. But at the same time our foreign policy is fundamentally ideological in nature.
Like the coups that USA conducts to remove democracy to install dictatorships.
Most Americans have absurd views of American foreign policy because of ignorance. But, given your Bangladeshi origin, in your case it is not ignorance. You are just volunteering as an unpaid American propagandist or random social media forums, even though you are well aware of all the CIA coups all over the world.